SEC Filings for ADVENT TECHNOLOGIES HOLDINGS, INC. (ADNH)

Last updated: 2026-01-21 21:03 UTC | Total filings: 385

Browse the latest SEC filings and forms submitted by ADVENT TECHNOLOGIES HOLDINGS, INC. (ADNH). Access annual reports, quarterly statements, and other official disclosures.

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Form Filing Date Description Link
25-NSE Jan. 21, 2026 - View Document
25-NSE Jan. 21, 2026 - View Document
8-K Jan. 15, 2026 8-K View Document
10-Q Nov. 17, 2025 10-Q View Document
NT 10-Q Nov. 14, 2025 NT 10-Q View Document
8-K Nov. 10, 2025 8-K View Document
8-K Nov. 3, 2025 8-K View Document
8-K Oct. 29, 2025 8-K View Document
8-K Oct. 22, 2025 8-K View Document
DEF 14A Sept. 30, 2025 DEF 14A View Document
8-K Sept. 12, 2025 8-K View Document
8-K Sept. 4, 2025 8-K View Document
EFFECT Aug. 27, 2025 - View Document
424B3 Aug. 27, 2025 424B3 View Document
CORRESP Aug. 25, 2025 - View Document
UPLOAD Aug. 25, 2025 - View Document
8-K Aug. 22, 2025 8-K View Document
8-K Aug. 18, 2025 8-K View Document
S-1 Aug. 18, 2025 S-1 View Document
8-K Aug. 12, 2025 8-K View Document
10-Q Aug. 12, 2025 10-Q View Document
8-K Aug. 7, 2025 8-K View Document
S-8 July 18, 2025 S-8 View Document
8-K July 3, 2025 8-K View Document
10-Q June 30, 2025 10-Q View Document
10-K June 6, 2025 10-K View Document
8-K May 27, 2025 8-K View Document
NT 10-Q May 14, 2025 NT 10-Q View Document
8-K April 17, 2025 8-K View Document
8-K April 15, 2025 8-K View Document
4 April 2, 2025 FORM 4 View Document
3 April 2, 2025 FORM 3 View Document
NT 10-K March 31, 2025 NT 10-K View Document
3 March 11, 2025 FORM 3 View Document
3 March 11, 2025 FORM 3 View Document
8-K March 11, 2025 8-K View Document
3 March 11, 2025 FORM 3 View Document
3 March 11, 2025 FORM 3 View Document
3 March 11, 2025 FORM 3 View Document
8-K Jan. 2, 2025 8-K View Document
10-Q Dec. 27, 2024 10-Q View Document
8-K/A Dec. 18, 2024 8-K/A View Document
DEF 14A Dec. 10, 2024 DEF 14A View Document
8-K Nov. 27, 2024 8-K View Document
8-K Nov. 26, 2024 8-K View Document
NT 10-Q Nov. 14, 2024 NT 10-Q View Document
8-K Nov. 8, 2024 8-K View Document
8-K Oct. 29, 2024 8-K View Document
8-K Oct. 24, 2024 8-K View Document
8-K Oct. 23, 2024 8-K View Document
8-K Oct. 21, 2024 8-K View Document
10-Q Oct. 15, 2024 10-Q View Document
10-Q Oct. 15, 2024 10-Q View Document
8-K/A Oct. 2, 2024 8-K/A View Document
8-K Sept. 20, 2024 8-K View Document
8-K Sept. 5, 2024 8-K View Document
8-K Aug. 22, 2024 8-K View Document
8-K Aug. 20, 2024 8-K View Document
NT 10-Q Aug. 14, 2024 NT 10-Q View Document
10-K Aug. 13, 2024 10-K View Document
8-K Aug. 5, 2024 8-K View Document
8-K July 25, 2024 8-K View Document
8-K July 12, 2024 8-K View Document
8-K May 29, 2024 8-K View Document
NT 10-Q May 29, 2024 NT 10-Q View Document
8-K May 22, 2024 8-K View Document
8-K May 16, 2024 8-K View Document
8-K May 9, 2024 8-K View Document
8-K May 1, 2024 8-K View Document
8-K April 23, 2024 8-K View Document
NT 10-K April 1, 2024 NT 10-K View Document
DEF 14A March 29, 2024 DEF 14A View Document
PRE 14A March 18, 2024 PRE 14A View Document
8-K March 12, 2024 8-K View Document
4 Feb. 20, 2024 FORM 4 View Document
3 Feb. 12, 2024 FORM 3 View Document
SC 13G/A Feb. 12, 2024 - View Document
8-K Jan. 25, 2024 8-K View Document
8-K/A Jan. 17, 2024 8-K/A View Document
8-K Jan. 11, 2024 8-K View Document
SC 13G/A Jan. 10, 2024 - View Document
424B5 Dec. 28, 2023 424B5 View Document
424B5 Dec. 27, 2023 424B5 View Document
8-K Dec. 27, 2023 8-K View Document
8-K Nov. 22, 2023 8-K View Document
8-K Nov. 14, 2023 8-K View Document
10-Q Nov. 14, 2023 10-Q View Document
SC 13G/A Oct. 3, 2023 - View Document
4 Sept. 8, 2023 FORM 4 View Document
4 Sept. 8, 2023 FORM 4 View Document
10-Q Aug. 14, 2023 10-Q View Document
8-K Aug. 11, 2023 8-K View Document
8-K June 20, 2023 8-K View Document
8-K June 2, 2023 8-K View Document
424B5 June 2, 2023 424B5 View Document
8-K May 26, 2023 8-K View Document
8-K May 15, 2023 8-K View Document
10-Q May 15, 2023 10-Q View Document
8-K May 5, 2023 8-K View Document
EFFECT May 2, 2023 - View Document
424B5 May 2, 2023 424B5 View Document
4/A April 28, 2023 FORM 4/A SUBMISSION View Document
CORRESP April 28, 2023 - View Document
UPLOAD April 27, 2023 - View Document
DEFA14A April 25, 2023 DEFA14A View Document
DEF 14A April 25, 2023 DEF 14A View Document
S-3 April 21, 2023 S-3 View Document
4/A April 14, 2023 FORM 4/A SUBMISSION View Document
4 April 14, 2023 FORM 4 SUBMISSION View Document
4/A April 14, 2023 FORM 4/A SUBMISSION View Document
4/A April 14, 2023 FORM 4/A SUBMISSION View Document
4/A April 14, 2023 FORM 4/A SUBMISSION View Document
PRE 14A April 13, 2023 PRE 14A View Document
8-K April 11, 2023 8-K View Document
SC 13G/A April 4, 2023 - View Document
10-K March 31, 2023 10-K View Document
8-K March 31, 2023 8-K View Document
8-K March 29, 2023 8-K View Document
8-K March 10, 2023 8-K View Document
SC 13G Feb. 9, 2023 - View Document
SC 13G/A Feb. 8, 2023 SEC SCHEDULE 13G View Document
4 Feb. 7, 2023 FORM 4 SUBMISSION View Document
4 Feb. 7, 2023 FORM 4 SUBMISSION View Document
4 Feb. 7, 2023 FORM 4 SUBMISSION View Document
SC 13G/A Jan. 31, 2023 - View Document
424B3 Jan. 5, 2023 424B3 View Document
424B3 Jan. 5, 2023 424B3 View Document
EFFECT Dec. 22, 2022 - View Document
POS AM Dec. 21, 2022 POS AM View Document
424B3 Nov. 14, 2022 424B3 View Document
3 Nov. 14, 2022 FORM 3 SUBMISSION View Document
10-Q Nov. 14, 2022 10-Q View Document
8-K Nov. 14, 2022 8-K View Document
424B3 Nov. 14, 2022 424B3 View Document
8-K Nov. 4, 2022 8-K View Document
424B3 Oct. 14, 2022 424B3 View Document
424B3 Oct. 14, 2022 424B3 View Document
4 Sept. 6, 2022 FORM 4 SUBMISSION View Document
8-K Sept. 2, 2022 8-K View Document
4 Aug. 26, 2022 4 View Document
4 Aug. 26, 2022 4 View Document
4 Aug. 26, 2022 4 View Document
4 Aug. 26, 2022 4 View Document
424B3 Aug. 24, 2022 424B3 View Document
424B3 Aug. 24, 2022 424B3 View Document
8-K Aug. 9, 2022 8-K View Document
10-Q Aug. 9, 2022 10-Q View Document
3 Aug. 5, 2022 FORM 3 SUBMISSION View Document
8-K July 22, 2022 8-K View Document
4 July 15, 2022 FORM 4 SUBMISSION View Document
8-K July 7, 2022 8-K View Document
SC 13G/A July 5, 2022 - View Document
424B3 June 21, 2022 424B3 View Document
424B3 June 21, 2022 424B3 View Document
8-K June 17, 2022 8-K View Document
4 June 17, 2022 FORM 4 SUBMISSION View Document
4 June 17, 2022 FORM 4 SUBMISSION View Document
4 June 17, 2022 FORM 4 SUBMISSION View Document
8-K June 16, 2022 8-K View Document
8-K June 14, 2022 8-K View Document
3 June 14, 2022 FORM 3 SUBMISSION View Document
8-K June 3, 2022 8-K View Document
424B3 May 13, 2022 424B3 View Document
424B3 May 13, 2022 424B3 View Document
8-K May 12, 2022 8-K View Document
10-Q May 12, 2022 10-Q View Document
DEFA14A May 2, 2022 DEFA14A View Document
424B3 April 29, 2022 424B3 View Document
EFFECT April 28, 2022 - View Document
CORRESP April 26, 2022 - View Document
UPLOAD April 26, 2022 - View Document
DEFA14A April 26, 2022 DEFA14A View Document
DEF 14A April 26, 2022 DEF 14A View Document
S-1 April 21, 2022 S-1 View Document
424B3 April 21, 2022 424B3 View Document
EFFECT April 19, 2022 - View Document
3 April 18, 2022 FORM 3 SUBMISSION View Document
POS AM April 15, 2022 POS AM View Document
8-K April 13, 2022 8-K View Document
8-K/A March 31, 2022 8-K/A View Document
10-K March 31, 2022 10-K View Document
8-K March 28, 2022 8-K View Document
SC 13G Feb. 14, 2022 SEC SCHEDULE 13G View Document
SC 13G/A Feb. 9, 2022 - View Document
SC 13G Jan. 31, 2022 - View Document
8-K Jan. 28, 2022 8-K View Document
10-Q Nov. 15, 2021 10-Q View Document
8-K Nov. 15, 2021 8-K View Document
424B3 Nov. 15, 2021 424B3 View Document
8-K/A Nov. 15, 2021 8-K/A View Document
424B3 Sept. 21, 2021 424B3 View Document
8-K/A Sept. 17, 2021 8-K/A View Document
8-K Sept. 13, 2021 8-K View Document
424B3 Sept. 13, 2021 424B3 View Document
8-K Sept. 13, 2021 8-K View Document
SC 13G Sept. 9, 2021 - View Document
8-K Sept. 1, 2021 8-K View Document
424B3 Sept. 1, 2021 424B3 View Document
8-K Sept. 1, 2021 8-K View Document
4 Aug. 26, 2021 FORM 4 View Document
424B3 Aug. 18, 2021 424B3 View Document
8-K Aug. 18, 2021 FORM 8-K View Document
10-Q Aug. 12, 2021 10-Q View Document
8-K Aug. 12, 2021 8-K View Document
424B3 Aug. 12, 2021 424B3 View Document
3 July 20, 2021 PRIMARY DOCUMENT View Document
8-K July 6, 2021 8-K View Document
424B3 July 6, 2021 424B3 View Document
8-K June 25, 2021 8-K View Document
424B3 June 25, 2021 424B3 View Document
4/A June 16, 2021 FORM 4/A View Document
4 June 15, 2021 FORM 4 View Document
4 June 15, 2021 FORM 4 View Document
4 June 15, 2021 FORM 4 View Document
4 June 15, 2021 FORM 4 View Document
4 June 15, 2021 FORM 4 View Document
4 June 15, 2021 FORM 4 View Document
4 June 15, 2021 FORM 4 View Document
4 June 15, 2021 FORM 4 View Document
4 June 15, 2021 FORM 4 View Document
S-8 June 10, 2021 S-8 View Document
424B3 June 10, 2021 424B3 View Document
8-K June 10, 2021 FORM 8-K View Document
424B3 June 7, 2021 424B3 View Document
8-K June 7, 2021 8-K View Document
424B3 May 20, 2021 424B3 View Document
424B3 May 20, 2021 424B3 View Document
8-K/A May 20, 2021 8-K/A View Document
10-K/A May 20, 2021 10-K/A View Document
424B3 May 20, 2021 424B3 View Document
10-Q May 20, 2021 10-Q View Document
8-K May 20, 2021 8-K View Document
NT 10-Q May 17, 2021 NT 10-Q View Document
DEFA14A May 17, 2021 DEFA14A View Document
DEFA14A May 17, 2021 DEFA14A View Document
8-K May 17, 2021 8-K View Document
424B3 May 7, 2021 424B3 View Document
8-K May 7, 2021 FORM 8-K View Document
8-K April 16, 2021 8-K View Document
424B3 April 16, 2021 424B3 View Document
DEF 14A April 15, 2021 DEF 14A View Document
424B3 March 31, 2021 424B3 View Document
EFFECT March 30, 2021 - View Document
8-K March 29, 2021 8-K View Document
10-K March 26, 2021 10-K View Document
8-K/A March 26, 2021 8-K/A View Document
CORRESP March 26, 2021 - View Document
S-1/A March 26, 2021 S-1/A View Document
8-K Feb. 22, 2021 FORM 8-K View Document
UPLOAD Feb. 18, 2021 - View Document
SC 13D Feb. 16, 2021 SCHEDULE 13D FOR ADVENT TECHNOLOGIES HOLDINGS, INC. ON BEHALF OF VASSILIOS GREGO View Document
S-1 Feb. 16, 2021 S-1 View Document
SC 13D Feb. 16, 2021 SCHEDULE 13D FOR ADVENT TECHNOLOGIES HOLDINGS, INC. ON BEHALF OF CHRISTOS KASKAV View Document
SC 13G/A Feb. 11, 2021 ADVENT TECHNOLOGIES INC. View Document
SC 13G/A Feb. 11, 2021 AMCI ACQUISITION CORP. View Document
8-K/A Feb. 9, 2021 8-K/A View Document
8-K Feb. 9, 2021 FORM 8-K View Document
SC 13G Feb. 8, 2021 - View Document
25-NSE Feb. 5, 2021 - View Document
4 Feb. 5, 2021 PRIMARY DOCUMENT View Document
4 Feb. 5, 2021 PRIMARY DOCUMENT View Document
4 Feb. 5, 2021 PRIMARY DOCUMENT View Document
4 Feb. 5, 2021 PRIMARY DOCUMENT View Document
4 Feb. 5, 2021 PRIMARY DOCUMENT View Document
4 Feb. 5, 2021 PRIMARY DOCUMENT View Document
3 Feb. 5, 2021 PRIMARY DOCUMENT View Document
3 Feb. 5, 2021 PRIMARY DOCUMENT View Document
3 Feb. 5, 2021 PRIMARY DOCUMENT View Document
3 Feb. 5, 2021 PRIMARY DOCUMENT View Document
3 Feb. 5, 2021 PRIMARY DOCUMENT View Document
3 Feb. 5, 2021 PRIMARY DOCUMENT View Document
3 Feb. 5, 2021 PRIMARY DOCUMENT View Document
8-K Feb. 4, 2021 8-K View Document
SC 13G Feb. 3, 2021 - View Document
8-K Feb. 3, 2021 8-K View Document
424B3 Jan. 20, 2021 424B3 View Document
EFFECT Jan. 19, 2021 - View Document
CORRESP Jan. 15, 2021 - View Document
CORRESP Jan. 14, 2021 - View Document
S-4/A Jan. 14, 2021 S-4/A View Document
UPLOAD Jan. 12, 2021 - View Document
SC 13G/A Jan. 11, 2021 - View Document
8-K Jan. 8, 2021 8-K View Document
425 Jan. 6, 2021 425 View Document
8-K Jan. 6, 2021 8-K View Document
CORRESP Dec. 31, 2020 - View Document
S-4/A Dec. 31, 2020 S-4/A View Document
425 Dec. 22, 2020 425 View Document
8-K Dec. 22, 2020 8-K View Document
UPLOAD Dec. 21, 2020 - View Document
SC 13G/A Dec. 7, 2020 AMCI 13G/A View Document
4 Dec. 3, 2020 - View Document
SC 13G/A Dec. 3, 2020 AMCI ACQUISITION CORP. View Document
4 Dec. 2, 2020 PRIMARY DOCUMENT View Document
4 Dec. 1, 2020 PRIMARY DOCUMENT View Document
3 Nov. 30, 2020 - View Document
8-K Nov. 25, 2020 8-K View Document
4 Nov. 25, 2020 PRIMARY DOCUMENT View Document
425 Nov. 25, 2020 425 View Document
RW Nov. 24, 2020 FORM RW View Document
S-4 Nov. 24, 2020 S-4 View Document
10-Q Nov. 12, 2020 10-Q View Document
S-4 Nov. 9, 2020 S-4 View Document
NT 10-Q Nov. 9, 2020 NT 10-Q View Document
4 Oct. 21, 2020 PRIMARY DOCUMENT View Document
8-K Oct. 20, 2020 8-K View Document
4 Oct. 20, 2020 PRIMARY DOCUMENT View Document
425 Oct. 20, 2020 425 View Document
8-K Oct. 19, 2020 8-K View Document
8-K Oct. 16, 2020 8-K View Document
425 Oct. 16, 2020 425 View Document
4 Oct. 15, 2020 PRIMARY DOCUMENT View Document
8-K Oct. 13, 2020 8-K View Document
425 Oct. 13, 2020 425 View Document
DEFA14A Oct. 13, 2020 DEFA14A View Document
DEF 14A Oct. 1, 2020 DEF 14A View Document
4 Sept. 24, 2020 PRIMARY DOCUMENT View Document
DEFA14A Sept. 22, 2020 DEFA 14A View Document
8-K Sept. 22, 2020 8-K View Document
PRE 14A Sept. 18, 2020 PRE14A View Document
4 Sept. 18, 2020 PRIMARY DOCUMENT View Document
10-Q Aug. 10, 2020 10-Q View Document
4 May 27, 2020 PRIMARY DOCUMENT View Document
8-K May 21, 2020 8-K View Document
8-K May 15, 2020 8-K View Document
DEFA14A May 11, 2020 DEFA14A View Document
10-Q May 11, 2020 10-Q View Document
SC 13G/A May 8, 2020 AMCI View Document
DEFA14A May 8, 2020 DEFA14A View Document
8-K May 8, 2020 8-K View Document
DEF 14A April 28, 2020 DEF 14A View Document
3 April 27, 2020 PRIMARY DOCUMENT View Document
PRE 14A April 17, 2020 PRE 14A View Document
SC 13G/A April 13, 2020 - View Document
SC 13G/A April 3, 2020 AMCI 13G/A View Document
4 March 27, 2020 PRIMARY DOCUMENT View Document
10-K March 27, 2020 10-K View Document
3 March 26, 2020 PRIMARY DOCUMENT View Document
4 March 26, 2020 PRIMARY DOCUMENT View Document
SC 13G/A March 20, 2020 AMCI View Document
3 March 20, 2020 PRIMARY DOCUMENT View Document
NT 10-K March 17, 2020 NT 10-K View Document
SC 13G/A Feb. 14, 2020 AQR CAPITAL MANAGEMENT LLC View Document
SC 13G/A Feb. 14, 2020 - View Document
SC 13G/A Feb. 13, 2020 AMCI ACQUISITION CORP. View Document
SC 13G Feb. 11, 2020 - View Document
SC 13G/A Feb. 7, 2020 - View Document
8-K Dec. 16, 2019 8-K View Document
DEF 14A Nov. 29, 2019 DEF 14A View Document
8-K Nov. 19, 2019 8-K View Document
10-Q Nov. 12, 2019 10-Q View Document
SC 13G Oct. 9, 2019 - View Document
10-Q Aug. 9, 2019 10-Q View Document
10-Q May 15, 2019 10-Q View Document
10-K April 1, 2019 10-K View Document
SC 13G Feb. 13, 2019 SC 13G View Document
SC 13G Feb. 11, 2019 - View Document
SC 13G Feb. 1, 2019 AMCI 13G View Document
8-K Dec. 21, 2018 8-K View Document
8-K Nov. 30, 2018 8-K View Document
4 Nov. 29, 2018 FORM 4 View Document
8-K Nov. 27, 2018 8-K View Document
SC 13G Nov. 26, 2018 AMCI ACQUISITION CORP. View Document
SC 13G Nov. 26, 2018 AQR CAPITAL MANAGEMENT LLC View Document
SC 13G Nov. 26, 2018 AMCI ACQUISITION CORP. View Document
8-K Nov. 20, 2018 8-K View Document
424B4 Nov. 16, 2018 424B4 View Document
CERT Nov. 15, 2018 - View Document
3 Nov. 15, 2018 FORM 3 View Document
3 Nov. 15, 2018 FORM 3 View Document
3 Nov. 15, 2018 FORM 3 View Document
3 Nov. 15, 2018 FORM 3 View Document
3 Nov. 15, 2018 FORM 3 View Document
3 Nov. 15, 2018 FORM 3 View Document
3 Nov. 15, 2018 FORM 3 View Document
EFFECT Nov. 15, 2018 - View Document
8-A12B Nov. 14, 2018 FORM 8-A12B View Document
CORRESP Nov. 14, 2018 - View Document
CORRESP Nov. 14, 2018 - View Document
S-1/A Nov. 9, 2018 FORM S-1/A View Document
S-1 Oct. 25, 2018 S1 View Document
DRSLTR Aug. 17, 2018 - View Document
DRS/A Aug. 17, 2018 - View Document
UPLOAD Aug. 14, 2018 - View Document
DRS July 20, 2018 - View Document